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We present the serendipitous detection of a new Galactic Supernova Remnant(SNR), G288.8-6.3 using data from the Australian Square Kilometre ArrayPathfinder (ASKAP)-Evolutionary Map of the Universe (EMU) survey. Usingmulti-frequency analysis, we confirm this object as an evolved Galactic SNR athigh Galactic latitude with low radio surface brightness and typical SNRspectral index of $\alpha = -0.41\pm0.12$. To determine the magnetic fieldstrength in SNR G288.8-6.3, we present the first derivation of theequipartition formulae for SNRs with spectral indices $\alpha>-0.5$. Theangular size is $1.\!^\circ 8\times 1.\!^\circ 6$ $(107.\!^\prime 6 \times98.\!^\prime 4)$ and we estimate that its intrinsic size is $\sim40$pc whichimplies a distance of $\sim1.3$kpc and a position of $\sim140$pc above theGalactic plane. This is one of the largest angular size and closest GalacticSNRs. Given its low radio surface brightness, we suggest that it is about 13000years old.

EMU Detection of a Large and Low Surface Brightness Galactic SNR G288.8-6.3